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oai:uvadoc.uva.es:10324/334292025-03-26T19:10:04Zcom_10324_28708com_10324_954com_10324_894com_10324_1186com_10324_931col_10324_28709col_10324_1404

Plajer, Alex J. Enders, Markus García Romero, Álvaro Bond, Andrew D. García Rodríguez, Raúl Wright, Dominic Simon Producción Científica Difficulties in the preparation of neutral ligands of the type [RSi(2-py)3] (where 2-py is an unfunctionalised 2-pyridyl ring unit) have thwarted efforts to expand the coordination chemistry of ligands of this type. However, simply switching the pyridyl substituents to 6-methyl-pyridyl groups (6-Me-2-py) in the current paper has allowed smooth, high-yielding access to the [PhSi(6-Me-2-py)3] ligand (1), and the first exploration of its coordination chemistry with transition metals. The synthesis, single-crystal X-ray structures and solution dynamics of the new complexes [{PhSi(6-Me-2-py)3}CuCH3CN][PF6], [{PhSi(6-Me-2-py)3}CuCH3CN][CuCl2], [{PhSi(6-Me-2-py)3}FeCl2], [{PhSi(6-Me-2-py)3}Mo(CO)3] and [{PhSi(6-Me-2-py)3}CoCl2] are reported. The paramagnetic Fe2+ and Co2+ complexes show strongly shifted NMR resonances for the coordinated pyridyl units due to large Fermi-contact shifts. However, magnetic anisotropy also leads to considerable pseudo-contact shifts so that both contributions have to be included in the paramagnetic NMR analysis. 2018-12-12 2018-12-12 2018 info:eu-repo/semantics/article Dalton Transactions, 2018, Issue 20, pp. 7036-7043 1477-9226 http://uvadoc.uva.es/handle/10324/33429 10.1039/C8DT01332B eng https://pubs.rsc.org/en/content/articlelanding/2018/dt/c8dt01332b info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 International Royal Society of Chemistry